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Visualization and analysis of local and distant population flows on the Qinghai-Tibet Plateau using crowd-sourced data

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Journal of Geographical Sciences 2021年第2期31卷 231-244页

作者： XU jun LIU ju XU yang pei Tao State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources ResearchCASBeijing100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing100049China

Human migration between cities is one important aspect of spatial interaction that not only reflects urban attractiveness but also denotes interactions amongst *** therefore implemented a web-based visualization system to analyze and interactively explore local and distant population flow patterns between cities on the Qinghai-Tibet Plateau(QTP).We utilized 2017 Tencent population flow data from which we initially constructed inbound and outbound vectors for cities on the *** then used multidimensional scaling to examine and visualize migration patterns and similarities between *** reveal the presence of six local and three distant human mobility patterns on the QTP as well as average summer monthly migrations more than twice the level of those in the winter.

关键词： population flow visualization Tencent location big data spatiotemporal pattern Qinghai-Tibet Plateau

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课程思政融入初中语文的独特优势与实施策略

语言与文化研究

语言与文化研究 2025年第1期33卷 152-155页

作者：裴天娇侯菊云南大学

“课程思政”虽缘起高校，但思政内容与各学科融合的教育意义却为全学段所通用，初中阶段是青少年成才成长的“拔节孕穗期”，而语文作为兼具工具性与人文性的学科，与课程思政理念的有效融合能够为培养担当大任的时代新人起到独特引领... 详细信息

“课程思政”虽缘起高校，但思政内容与各学科融合的教育意义却为全学段所通用，初中阶段是青少年成才成长的“拔节孕穗期”，而语文作为兼具工具性与人文性的学科，与课程思政理念的有效融合能够为培养担当大任的时代新人起到独特引领作用。本文立足于课程思政融入初中语文的独特优势，以初中语文课程的特点为圭臬，提出发挥教师引领作用、合理挖掘思政元素、改变以往授课方式等教学策略，以期为课程思政融入初中语文教学实践提供有效的改革思路。

关键词：课程思政初中语文独特优势实施策略

Electrochemically stable lithium-ion and electron insulators(LEIs)for solid-state batteries

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Nano Research 2022年第2期15卷 1213-1220页

作者： Kai pei So Yeon Kim ju Li Frontier Institute of Science and Technology Xi'an Jiaotong UniversityXi'an 710049China Department of Materials Science and Engineering and Department of Nuclear Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA

Rechargeable solid-state Li metal batteries demand ordered flows of Li-ions and electrons in and out of solid structures,with repeated waxing and waning of Ubcc phase near contact interfaces which gives rise to various electro-chemo-mechanical *** have been approaches that adopt three-dimensional(3D)nanoporous architectures consisting of mixed ion-electron conductors(MIECs)to combat these ***,there has remained an issue of LiBcc nucleation at the interfaces between different solid components(e.g.,solid electrolyte/MlEC interface),which could undermine the interfacial bonding,thereby leading to the evolution of mechanical instability and the loss of ionic/electronic *** this regard,the present work shows that the Li-ion and electron insulators(LEIs)that are thermodynamically stable against LiBcc could combat such challenges by blocking transportation of charge carriers on the interfaces,analogous to dielectric layers in *** searched the ab initio database and have identified 48 crystalline compounds to be LEI candidates(46 experimentally reported compounds and 2 hypothetical compounds predicted to be stable)with a band gap greater than 3 eV and vanishing Li *** these compounds,those with good adhesion to solid electrolyte and mixed ion-electron conductor of interest,but are lithiophobic,are expected to be the most *** also extended the search to Na or K metal compatible alkali-ion and electron insulators,and identified some crystalline compounds with a property to resist corresponding alkali-ions and electrons.

关键词： electrochemical stability window stress fracture adhesion contact lithium metal anode

Characteristics of Welding Crack Defects and Failure Mode in Resistance Spot Welding of DP780 Steel

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Journal of Iron and Steel Research International 2016年第10期23卷 1104-1110页

作者： Xiao-pei WANG Yong-qiang ZHANG Jian-bin ju Jian-qiang ZHANG Jian-wei yang Shougang Research Institute of Technology Beijing 100043 China College of Science China University of Petroleum (Beijing) Beijing 102249 China

The mechanical properties of welded joints in resistance spot welding of DP780 steel were tested,and three different types of welding cracks in welded joints were investigated by optical microscopy,scanning electron microscopy and electron back-scattered ***,the failure mode of the welded joints in shear tensile test was *** is found the shear tensile strength of welded joints can be greatly improved by adding preheating current or tempering *** surface crack in welded joint is intergranular fracture,while the inner crack in welded joint is transgranular fracture,and the surface crack on the edge of the electrode imprint can be improved by adding preheating current or tempering *** traditional failure mode criterion advised by American Welding Society is no longer suitable for DP780 spot welds and the critical nugget size suggested by Pouranvari is overestimated.

关键词： resistance spot welding mechanical property crack defect failure mode DP780 steel

Effectiveness and safety of ultrasound-guided intramuscular lauromacrogol injection combined with hysteroscopy in cervical pregnancy treatment:A case report

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World Journal of Clinical Cases 2022年第18期10卷 6128-6135页

作者： Jian-pei Ye yang Gao Li-Wei Lu Yong-ju Ye Department of Ultrasonography Lishui Hospital of Traditional Chinese MedicineLishui 323000Zhejiang ProvinceChina Department of Gynaecology Lishui Hospital of Traditional Chinese MedicineLishui 323000Zhejiang ProvinceChina

BACKGROUND Cervical pregnancy is increasing in morbidity,and a definite diagnosis in early stages is challenging due to its specific onset *** is the mainstay of treatment for cervical pregnancy,but it may result in the loss of natural ***,it is a great challenge to pursue a safe and effective treatment for cervical *** SUMMARY We report the case of a cervical pregnancy successfully treated by ultrasoundguided cervical-intramuscular lauromacrogol injection combined with hysteroscopy.A 23-year-old woman with minor irregular vaginal bleeding was admitted to our department with suspected ectopic *** ultrasound revealed a gestational sac(approximately 22 mm x 13 mm)situated in the cervical canal with a yolk sac and blood flow *** cardiac activity was *** beta progesterone was 17.06 ng/m L,and serum beta human chorionic gonadotropin(β-HCG)was 5077.0 IU/*** patient was diagnosed with cervical *** was treated by ultrasound-guided cervicalintramuscular injections of lauromacrogol(3 m L)in combination with aborting under hysteroscopic visualization.A gradual decrease inβ-HCG levels and normal ultrasound findings were *** pathologic examination showed the presence of villi and changes in the endometrium in the secretory *** patient was discharged on day 6,and herβ-HCG level was 0.67 m IU/m L after 1 *** was no statistical difference between baseline and 1-week postoperative data in terms of serum indices including liver function,renal function,and routine blood analysis after *** patient subsequently became pregnant 2 mo later and no abnormalities were detected on routine screening during *** Ultrasound-guided cervical-intramuscular lauromacrogol injection combined with hysteroscopy may be effective and safe in the treatment of cervical pregnancy.

关键词： Cervical pregnancy Lauromacrogol Hysteroscopy Effectiveness Safety Case report

Kinetics of recrystallization for twin-roll casting AZ31 magnesium alloy during homogenization

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 570-575页

作者： Hu Zhao pei-jie Li Liang-ju He National Center of Novel Materials for International Research Tsinghua University Beijing 100084 China

The kinetics of recrystallization for twin-roll casting AZ31 magnesium alloy with different thicknesses during homogenization was *** is shown that fine grains are first formed at the boundaries of deformed bands in the twin-roll casting *** recrystallized grains with no strain are gradually substituted for the deformed microstructure of twin-roll casting AZ31 magnesium *** incubation temperature and time for the recrystallization of a twin-roll casting AZ31 magnesium alloy strip with a thickness of 3 mm are lower and shorter than those of the 6-mm thick strip,*** 3-mm thick twin-roll casting magnesium alloy has finer grains than the 6-mm thick *** activation energies of recrystallization for twin-roll casting AZ31 magnesium alloy slabs with the thickness of 3 and 6 mm are 88 and 69 kJ/mol,*** kinetics curves of recrystallization for twin-roll casting AZ31 magnesium alloy were obtained.

关键词： magnesium alloys twin-roll casting homogenization kinetics grain size

A Geodesign Method of Human-Energy-Water Interactive Systems for Urban Infrastructure Design： 10KM2 Near-Zero District Project in Shanghai

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Engineering 2018年第2期4卷 18-25页

作者： perry pei-ju yang Cheryl Shu-Fang Chi Yihan Wu Steven Jige Quan Eco-Urban Lab School of City and Regional Planning & School of Architecture College of Design Georgia Institute of Technology Atlanta GA 30332-0155 USA Eco-Urban Lab College of Architecture and Urban Planning Tongji University Shanghai 200092 China Disney Research China Shanghai 200021 China Groduate School of Environmental Studies Seoul Notional University Seoul 08826 Korea

The grand challenges of climate change demand a new paradigm of urban design that takes the perfor- mance of urban systems into account, such as energy and water efficiency. Traditional urban design methods focus on the form-making process and lack performance dimensions. Geodesign is an emerging approach that emphasizes the links between systems thinking, digital technology, and geographic con- text. This paper presents the research results of the first phase of a larger research collaboration and pro- poses an extended geodesign method for a district-scale urban design to integrate systems of renewable energy production, energy consumption, and storm water management, as well as a measurement of human experiences in cities. The method incorporates geographic information system （GIS）, parametric modeling techniques, and multidisciplinary design optimization （MDO） tools that enable collaborative design decision-making. The method is tested and refined in a test case with the objective of designing a near-zero-energy urban district. Our final method has three characteristics. （1） Integrated geodesign and parametric design： It uses a parametric design approach to generate focal-scale district prototypes by means of a custom procedural algorithm, and applies geodesign to evaluate the performances of design proposals. （2） A focus on design flow： It elaborates how to define problems, what information is selected, and what criteria are used in making design decisions. （3） Multi-objective optimization： The test case produces indicators from performance modeling and derives principles through a multi-objective computational experiment to inform how the design can be improved. This paper concludes with issues and next steps in modeling urban design and infrastructure systems based on MDO tools.

关键词： Geodesign Urban design Urban infrastructure Energy performancelterative process Multi-objective optimization

Magnetron sputtering NbSe_(2)film as lubricant for space current-carrying sliding contact

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Friction 2023年第3期11卷 383-394页

作者： yang yang Lulu pei Hongzhang ZHANG Kai FENG Pengfei ju Wenshan DUAN Li JI Hongxuan LI Xiaohong LIU Huidi ZHOU Jianmin CHEN Key Laboratory of Science and Technology on Wear and Protection of Materials Lanzhou Insttute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China School of Physics and Electronic Engineering Northwest Normal UniversityLanzhou 730070China Division of Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China College of Chemistry&Engineering Yantai UniversityYantai 264005China Shanghai Aerospace Equipment Manufacture Shanghai 200245China

This study demonstrates that magnetron-sputtered NbSe_(2)film can be used as a lubricant for space current-carrying sliding contact,which accommodates both metal-like conductivity and MoS_(2)-like *** at low pressure and low energy is performed to avoid the generation of the interference phase of NbSe_(3).The composition,microstructure,and properties of the NbSe_(2)films are further tailored by controlling the sputtering *** an appropriate current,the film changed from amorphous to crystalline,maintained a dense structure,and exhibited excellent comprehensive *** to the currently available electrical contact lubricating materials,the NbSe_(2)film exhibits a significant advantage under the combined vacuum and current-carrying *** friction coefficient decreases from 0.25 to 0.02,the wear life increases more than seven times,and the electric noise reduces approximately 50%.

关键词： NbSe_(2)films magnetron sputtering vacuum current-carrying tribological properties

Hydration process in Portland cement blended with activated coal gangue

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2011年第7期12卷 503-510页

作者： Xian-ping LIU pei-ming WANG Min-ju DING Key Laboratory of Advanced Civil Engineering Materials (Tong/i University) Ministry of Education Shanghai 201804 China State Key Laboratory Breeding Base of Crime Scene Evidence Shanghai 200083 China

This paper deals with the hydration of a blend of Portland cement and activated coal gangue in order to determine the relationship between the degree of hydration and compressive strength *** hydration process was investigated by various means:isothermal calorimetry,thermal analysis,non-evaporable water measurement,and X-ray diffraction *** results show that the activated coal gangue is a pozzolanic material that contributes to the hydration of the cement *** pozzolanic reaction occurs over a period of between 7 and 90 d,consuming portlandite and forming both crystal hydrates and ill-crystallized calcium silicate *** hydrates are similar to those found in pure Portland *** results show that if activated coal gangue is substituted for cement at up to 30%(w/w),it does not significantly affect the final compressive strength of the blend.A long-term compressive strength improvement can in fact be achieved by using activated coal gangue as a sup-plementary cementing *** relationship between compressive strength and degree of hydration for both pure Portland cement and blended cement can be described with the same ***,the parameters are different since blended cement produces fewer calcium silicate hydrates than pure Portland cement at the same degree of hydration.

关键词： Activated coal gangue Portland cement Blended cement Hydration Strength